ensure maintenance is carried out by a competent person (someone who has the necessary skills, knowledge and experience to carry out the work safely) 1  maintain plant and equipment regularly â use the manufacturerâs maintenance instructions as a guide, particularly if there are safety-critical features.
HDPE (High Density Polyethylene). 3/4 HDPE will cost about $45.00 for 100' ($0.45/ft), so depending on the amount required can be much cheaper than the previous options. HDPE is used by many municipalities as water supply lines, so it has been tried and tested in underground applications.
august 1 microsoft cuts the price of its hd dvd player for the xbox 360 from us $ 199 to us $ 179 and starts offering five free movies august 20 paramount and dreamworks animation both drop blu ray disc in favor of hd dvd september 13 sony says it will use blu ray disc in all high def video recorders in japan